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The mph and slip number he gave is not his slip at his quarter trap. Therefore it cant be used to determine a what if scenario if he went to a better unit. No doubt there is room for gain but it wont be anywhere near what you have suggested. Id have to see dragstrip mph to see what the hp actually is. Dynos are useless for comparison sake. All the different brands read differently. Mph and vehicle weight is a much more accurate indicator of power. I have this data for you on a 900+hp engine: Slipping 17% with an old AC the car mph 147-148. At 6% with a PTC it went 151.9mph. The PTC was a little too tight for this solid cammed engine. It dropped too low on shifts. But was still a lot better than the old AC up top based on the 4+mph increase in trap in a car already going nearly 150. These numbers are from actual data logs and drag strip time slips. The car had a driveshaft speed sensor to get exact slip numbers at all mph. If you reduce slip by 10% you dont pick up anywhere near 10% power at the wheels. Looks like about 5-6% at the wheels dropping 10%. I have yet to see anyone even come close to 700whp with a 6765 in a Buick at any boost level. The car would be running nearly mid 9's at about 140mph. 9.60 would be typical at that power level. At 22psi my guess he would run roughly 10.80's at 122-123mph if everything was spot on and the timing and a/f were run on the edge weighing about 3600.
Yeah it would be good to see the number but the dynos dont load the car as much as 3rd on the strip does so slip is ususlly less on the dyno. 700 at the wheels is 70HPQ land. Not typical with a 67 even if Q trim unless you are Melissa:tongue: . Though in THS it sure will be. Q trim for sure though. The turbo is being worked hard in that application.Well put, on a side note most GN converter companies know to make it tighter around the 5600rpm mark for us. Damn that's what I'm spinning total so for a bunch of us, that would be the max regardless so I don't want to keep spinning to find out how much tighter that Art Carr would get.
I'd like to see SpoolFool get back on the dyno with a great converter and post the results. I don't recall ever seeing a before and after GN dyno with just a converter mod. I know you're not a huge dyno fan Bison but it would be interesting to see what the wheels say.
I was getting at his 500whp dyno run with a converter slipping a ton could be around 600 at the motor which is pretty impressive at that psi level. 700 to the wheels is a ton of power, maybe Billet 67 land.
